MEDSI2016 - List of Keywords (photon)

Paper	Title	Other Keywords	Page
MOPE05	Mechanical Design of Secondary Source Slits for Hard X-ray Beamlines at Taiwan Photon Source	ion, controls, scattering, site	12
	H.Y. Yan, C.H. Chang, S.H. Chang, C.Y. Chen, C.Y. Huang, J.M. Lin, D.G. Liu, D.-J. Wang NSRRC, Hsinchu, Taiwan
	The secondary source slits have been developed for specific hard X-ray beam-lines at Taiwan Photon Source. Especially for Coherent X-ray Scattering and X-ray Nanoprobe beam-lines, severe specifications of the slits are more necessary to define proper beam sizes in horizontal and vertical directions at sample. The opening size of each pair of slits assembled orthogonally is usually needed to range within several microns, so the UHV-compatible piezo-driven stages with closed-loop system were adopted for the purposes of fine adjustment, precise positional accuracy and repeatability. To reduce X-ray scattering effect, the rectangular single-crystal film was bonded on the edge of the slit blade. The machined rotary weak-link structure and piezo-driven actuators were used to slightly adjust parallelism of each pair of the blades with the method of single-slit diffraction. To enhance structural and thermal stability, the granite plinths with specified shape were designed and the precise temperature controlling system will be set up recently. The overall design, mechanical specifications and procedure of testing for secondary source slits will be introduced in this paper.
	Poster MOPE05 [0.795 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE05
About •	paper received ※ 09 September 2016 paper accepted ※ 14 September 2016 issue date ※ 22 June 2017
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MOPE23	An Assembling Calibration Method of XBPM Diamond Blades in TPS	ion, survey, alignment, network	54
	H.C. Ho, M.L. Chen, K.H. Hsu, D.-G. Huang, C.K. Kuan, W.Y. Lai, C.J. Lin, S.Y. Perng, T.C. Tseng, H.S. Wang NSRRC, Hsinchu, Taiwan
	Diamond blade type X-ray Beam Position Monitors (XBPM) were adopted to monitor photon position at the beamline front-end in Taiwan Photon Source (TPS). Due to the thin thickness (125um) and fragile characteristic, the assembling precision of the diamond blades are hard to measure and influence the accuracy of monitor. A non-contact method was thus developed by using a led laser with telecentric objective lens and a CCD-array to calibrate the diamond blades assembling configuration within micrometer accuracy. According to the measurement results, XBPM can be correlated to four fiducial points for survey network. This paper describes this method and calibrating results in detail.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE23
About •	paper received ※ 10 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017
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MOPE24	The Precision Adjustment Holder for Montel Mirrors	ion, focusing, optics, alignment	57
	B.Y. Chen, S.H. Chang, H.Y. Chen, C.Y. Lee, B.H. Lin, M.T. Tang, S.C. Tseng, J.X. Wu, G.C. Yin NSRRC, Hsinchu, Taiwan M. Hong National Taiwan University, Taipei, Taiwan J.R. Kwo NTHU, Hsinchu, Taiwan
	The focusing of X-ray nanoprobe at TPS relay upon the special designed Montel mirrors and its adjustment holder. The holder includes two major parts: (1) fundamental-position alignment part and (2) relative-position adjustment part. The fundamental-position alignment part has the ability to adjust the two mirrors together in 6 DOF., such as X, Y, Z, pitch, roll, and yaw. These translation stages have several-tens mm travel range and nm resolution, while the rotational stages have 40 mrad azimuthal angular range and 0.1~0.01 µrad resolution. The relative-position adjustment part can further adjust the two mirrors to minimize the focal spot. During the pre-alignment process, one of the mirrors can be manual adjusted by micrometer heads in three translation directions with several mm travel range and micro-meters resolution. These micrometer heads also provide this mirror three rotational degree of freedoms with sub-mrad resolution. For the further alignment in vacuum, the additional four piezo-motor actuators can precisely adjust the other Montel mirror in the Y and Z direction with several nm resolution, and its pitch and roll with 1 urad and 0.05 urad resolution, respectively.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE24
About •	paper received ※ 14 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017
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MOPE26	Front End Photon Shutter Water Leak to Vacuum at the Canadian Light Source	ion, operation, vacuum, cavity	60
	G.R. Henneberg, M.J.P. Adam, G.R. Barkway CLS, Saskatoon, Saskatchewan, Canada
	In early July 2016 CLS experienced a water to vacuum leak in the storage ring. The source of the leak was a pin hole in the absorbing surface of Photon Shutter 1 in the front end of the HXMA Beamline. The leak was caused by high velocity cooling water erosion of the internal cooling water path of the copper photon shutter block. The poster will present the root cause analysis of the leak, implications for other identical photon shutters and currently in service and the current remedial action plan.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE26
About •	paper received ※ 11 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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MOPE40	Designing the Flash II Photon Diagnostic Beamline and Components	ion, diagnostics, vacuum, experiment	96
	D. Meissner, M. Brachmanski, M. Hesse, U. Jastrow, M. Kuhlmann, H. Mahn, F. Marutzky, E. Plönjes-Palm, M. Röhling, H. Schulte-Schrepping, K.I. Tiedtke, R. Treusch DESY, Hamburg, Germany
	From 2013 to 2016 the free electron laser FLASH at DESY in Hamburg, Germany was upgraded with a second undulator line, photon diagnostic line, beam distribution and experimental hall connected to the same linear accelerator. This paper shows the layout of the photon diagnostic section and an overview of the civil engineering challenges. The mechanical design of selected components, e.g. vacuum components, diagnostic equipment and safety related components is presented.
	Poster MOPE40 [1.081 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE40
About •	paper received ※ 08 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017
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TUBA04	Mechanical Design and Development of Compact Linear Nanopositioning Flexure Stages with Centimeter-Level Travel Range and Nanometer-Level Resolution	ion, GUI, controls, laser	124
	D. Shu, J.W.J. Anton, S.P. Kearney, B. Lai, W. Liu, J. Maser, C. Roehrig, J.Z. Tischler ANL, Argonne, Illinois, USA J.W.J. Anton University of Illinois at Chicago, Chicago, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. Nanopositioning techniques present an important capability to support the state-of-the-art synchrotron radiation instrumentation research for the APS operations and upgrade project. To overcome the performance limitations of precision ball-bearing-based or roller-bearing-based linear stage systems, two compact linear nanopositiioning flexure stages have been designed and developed at the APS with centimeter-level travel range and nanometer-level resolution for x-ray experimental applications. The APS T8-54 linear flexure stage is designed to perform a precision wire scan as a differential aperture for the 3-D diffraction microscope at the APS sector 34, and the APS T8-56 linear flexure stage is designed for a horizontal sample scanning stage for a hard x-ray microscope at the APS sector 2. Both linear flexure stages are using a similar improved deformation compensated linear guiding mechanism which was developed initially at the APS for the T8-52 flexural linear stage . The mechanical design and finite element analyses of the APS T8-54 and T8-56 flexural stages, as well as its initial mechanical test results with laser interferometer are described in this paper. U.S. Patent granted No. 8,957, 567, D. Shu, S. Kearney, and C. Preissner, 2015.
	Slides TUBA04 [7.057 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA04
About •	paper received ※ 10 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017
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TUPE08	Finite Element Analysis of a Photon Absorber Based on Volumetric Absorption of the Photon Beam	ion, radiation, simulation, synchrotron-radiation	169
	K.J. Suthar, P.K. Den Hartog ANL, Argonne, Illinois, USA
	Funding: This research used resources of the APS, a U.S. Department of Energy (DOE) Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Designing photon absorbers for next generation multibend achromat storage rings can be challenging considering the high power densities and limited space that will typically be present. The potential for problematically high material temperatures and thermal gradients can be expected to be greater than that for previous generation machines on account of the shorter source-to-receiving surface distances. Conventionally, photon absorbers are made from copper which is highly opaque to x-rays. A consequence of this is that the majority of the heat is absorbed within a very short distance of the surface. Utilizing materials that allow a more volumetric absorption of the radiation can improve the efficiency of heat removal as it can keep surface temperatures and thermal gradients lower than would otherwise be possible. This paper discusses multiphysics analysis of a crotch absorber for the APS Upgrade project (APS-U) via full-coupling of heat-transfer and structural mechanics. The simulation results are discussed in detail.
	Poster TUPE08 [1.943 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE08
About •	paper received ※ 10 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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TUPE23	Glidcop Brazing in Sirius’ High Heat Load Front-End Components	ion, vacuum, synchrotron, operation	216
	G.V. Claudiano, O.R. Bagnato, P.T. Fonseca, F.R. Francisco, R.L. Parise, L.M. Volpe LNLS, Campinas, Brazil
	Sirius is a 4th generation synchrotron light source in project. Some of Sirius’ beamlines will have a very high power density, more than 50 kW/mrad², to be dissipated in components that have a limited space condition. Thus, the refrigeration of these components is complex when one has in mind that the coolant flow cannot be too turbulent in order to not induce much vibration in the components. Oxygen Free Electrolytic Cu (OFEC) has been replaced by the Glidcop, on 4th generation synchrotron applications, due to its good thermal conductivity and preservation of mechanical properties after heating cycles. However, as this material is not very workable in terms of union with other materials, which led to the development of a brazing process for Glidcop and stainless steel union. Glidcop samples were submitted to a Cu-electroplating process and a silver base alloy (BVAg-8) was used to join the parts in a high vacuum furnace. Electroplating was used to improve the filler metal wettability. The results were very satisfactory, ensuring water and vacuum tightness. A desirable characteristic not yet proved is the virtual leak property. This paper will discourse about this brazing method.
	Poster TUPE23 [1.553 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE23
About •	paper received ※ 09 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017
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TUPE28	Characterization of the Acoustic Field Generated by the Single-Axis Acoustic Levitator	ion, experiment, simulation, LabView	226
	A. Chavan GIT/ECE, Atlanta, Georgia, USA A. DiChiara, P.D. Hartog, B. Hu, K.J. Suthar ANL, Argonne, Illinois, USA
	The acoustic levitator utilizes two transducers that emit acoustic waves. A standing wave is generated between the two transducers that allows for the levitation of particles at the nodes of the standing wave. These levitated particles experience an instability. In order to aid in the process of solving this instability, the acoustic field created by one of the transducers was characterized in this experiment. This characterization helps to understand the intensity of the acoustic field at different points throughout the region and how the acoustic wave diverges as it travels away from the transducer.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE28
About •	paper received ※ 10 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017
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TUPE31	Manufacturing of Photon Beam-Intercepting Components from CuCrZr	ion, vacuum, operation, synchrotron	233
	F.A. DePaola, C. Amundsen, S.K. Sharma BNL, Upton, Long Island, New York, USA
	Photon beam-intercepting components in synchrotron light sources have usually been made as water-cooled Glidcop bodies brazed to stainless steel conflate flanges. This fabrication method involves many manufacturing steps which result in increased cost, long procurement time and lower manufacturing reliability. A new design approach was recently proposed which simplifies fabrication by eliminating brazing and utilizes a readily available copper alloy, CuCrZr. This paper describes the manufacturing experience gained at NSLS-II from fabricating many components of this new design. Results of an investigation of various techniques for joining CuCrZr to itself and to SS304 and AL-6061 are also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE31
About •	paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
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TUPE44	Optimization for the APS-U Magnet Support Structure	ion, alignment, ECR, software	254
	Z. Liu, H. Cease, J.T. Collins, J. Nudell, C.A. Preissner ANL, Argonne, Illinois, USA
	Funding: Work supported by: Argonne is managed by UChicago Argonne, LLC, for the U.S. Department of Energy under contract DE-AC02-06CH11357. The Advanced Photon Source Upgrade (APSU) is to replace the existing storage ring with a multi-bend achromats (MBA) accelerator lattice . For the APS-U removal and installation, current planning calls for a 12-month shutdown and testing period, prior to resumption of operations. It calls for quick installation of the magnet support system with assembly and installation alignment tolerance. A three-point, semi-kinematic vertical mount for the magnet modules is the approach to reduce time for alignment. The longest section is the curved FODO section (four quads with three Q-bends interleaved, and a three-pole wiggler). All magnets of the FODO section sit on a single piece of support structure in order to have a good control over the magnet-to-magnet alignment tolerance. It brings challenge to minimize the top surface deflection and maximize the first mode frequency of the magnet support structure that is supported at three points. These constraints call for the need of optimizing the magnet support structures. Details of the optimization, including three-point positioning, material selection, and topology optimization, are reported in this study. Glenn Decker (2014) Design Study of an MBA Lattice for the Advanced Photon Source, Synchrotron Radiation News, 27:6, 13-17, DOI: 10.1080/08940886.2014.970932
	Poster TUPE44 [1.889 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE44
About •	paper received ※ 07 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
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WEBA03	Recent Progress on the Design of High-Heat-Load Components	ion, SRF, dipole, vacuum	277
	S.K. Sharma, C. Amundsen, F.A. DePaola, F.C. Lincoln, J.L. Tuozzolo BNL, Upton, Long Island, New York, USA
	A new design was recently proposed for the high power masks and slits of the front-ends at the 2014 MEDSI Conference. The main features of the new design are integrated knife edges in high conductivity copper alloys, interception of the photon beam only on horizontal surfaces, replacing Glidcop® with readily available CuCrZr, and thermal optimization with internal fins. Numerous components based on this design have been built for NSLS-II front-ends and some of the design features have been incorporated into other high-heat-load components such as beamline masks and crotch absorbers. In this paper we describe recent progress at NSLS-II in further advancing this design approach by FE analysis, fabrication and testing.
	Slides WEBA03 [4.523 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA03
About •	paper received ※ 09 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017
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WEBA04	A Discussion on Utilization of Heat Pipes and Vapour Chamber Technology as a Primary Device for Heat Extraction from Photon Absorber Surfaces	ion, radiation, simulation, factory	280
	K.J. Suthar, P.K. Den Hartog, A.M. Lurie ANL, Argonne, Illinois, USA
	Funding: This research used resources of the APS, a U.S. Department of Energy Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The basic problem for photon absorbers in a particle accelerator is to remove a large quantity of heat from a small space. Heat pipes and vapor chambers excel at precisely this so it is natural to consider them for the application. However, even though this technology has been proven to be an excellent thermal management solution for cooling everything from laptops to satellite shields in space, they have yet to be adopted for use in particle accelerators. The use of heat pipes and vapor chambers are thermal transport devices which work on the principle of capillary-force-driven two-phase flow. These devices are highly customizable and offer very high effective thermal conductivities (5,000-200, 000 W/m/K) depending on many factors including size, shape, and orientation. This paper discusses feasibility of the use of heat pipes and vapor chambers as the primary heat transport devices in particle accelerator photon absorbers. We discuss their limitations and advantages via careful consideration of analysis and simulation results assuming properties described in the literature and manufacturer specifications.
	Slides WEBA04 [3.263 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA04
About •	paper received ※ 10 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
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WEPE01	Combined Fixed Mask, Photon Shutter, Safety Shutter, and Collimator Design for BXDS IVU at the CLS	ion, radiation, operation, vacuum	309
	M.J.P. Adam, C. Bodnarchuk CLS, Saskatoon, Saskatchewan, Canada
	Funding: Canadian Foundation for Innovation The first shutter assembly outside of the Front End (FE) for Brockhouse X-Ray Diffraction and Scattering Sector (BXDS) beamline required a unique design solution to accommodate all components into required safety shutter position. Located between the IVW high energy wiggler monochromator and POE1 wall, the total envelope size approximated 1m x 0.660m (LxW). Accommodating a smaller space required an alternative shutter design than traditionally used implemented at the CLS. The alternative proposed design combined the collimator (CLM), safety shutter (SSH), photon shutter (PSH) and Fixed Mask (FM) into one chamber. Finite Element Analysis (FEA) was conducted on the FM and PSH assembly to verify that geometric designs were adequate for reasonable operation in the beamline. FEA was used to determine the steady-state thermal and static-structural response in both operating positions. Missteer was analyzed for both operating positions to a maximum of 2.5mm (commonly accepted missteer used at the CLS) from center. Finally, two extreme position (5mm) analyses were completed for determination of potential, but unlikely operating conditions.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE01
About •	paper received ※ 11 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017
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WEPE03	Beamline Front Ends at the 2.5-GeV Photon Factory Storage Ring	ion, wiggler, storage-ring, undulator	315
	H. Miyauchi, S. Asaoka, T. Tahara KEK, Ibaraki, Japan
	Since the first commissioning in 1982, the 2.5-GeV Photon Factory storage ring has been upgraded three times in 1986, 1997 and 2005, in order to reduce the beam emittance and to create new four short straight sections for in-vacuum short period undulators. To satisfy the new boundary conditions of the upgrades, the beamline front ends were re-designed. We look back on the history of the beamline front-end components at the Photon Factory.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE03
About •	paper received ※ 15 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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WEPE06	High Heat Load Front Ends for Sirius	ion, vacuum, storage-ring, radiation	324
	L.M. Volpe, H.F. Canova, P.T. Fonseca, P.P.S. Freitas, A. Gilmour, A.S. Rocha, G.L.M.P. Rodrigues, L. Sanfelici, M. Saveri Silva, H. Westfahl Jr., H.G.P. de Oliveira LNLS, Campinas, Brazil
	Funding: Brazilian Ministry of Science, Technology, Innovation and Communication (MCTIC) Currently under construction on Brazilian Synchrotron Light Laboratory Campus, Campinas/SP, Sirius is a 3GeV, 4th Generation Synchrotron Light Source. In this paper we describe the Front End that has been designed to transmit the intense synchrotron radiation generated by the insertion devices that will generate the most critical thermal stress, with a peak power density of 55.7 kW/mrad² and a total power of 9.3kW at 500mA in the storage ring. The functions of the main components and their location in the layout are described. Computational fluid dynamics (CFD) and structural simulations, that have been carried out to verify the performance under the high heat loads generated by Sirius, are also detailed along with the limits of temperature and stress that have been employed in the design.
	Poster WEPE06 [1.415 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE06
About •	paper received ※ 11 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017
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WEPE07	A High Heat Load Front-End for the Superconducting Wiggler Beamline at SSRF	ion, SRF, vacuum, radiation	327
	Y. Li, D. Jia, S. Xue, M. Zhang, W. Zhu SINAP, Shanghai, People’s Republic of China
	A superconducting wiggler (SCW) will be first employed to generate high energy X-rays for ultra-hard X-ray applications beamline at Shanghai synchrotron radiation facility (SSRF). The front-end will handle a heat load of 44.7 kW with a peak power density of 45 kW/mrad², which is much higher than the commissioned ones at SSRF. Overall design of the high heat load front-end has been completed, including one short absorber with a length of 300 mm and three long absorbers longer than 500 mm. Long absorbers have been designed to be made by medium speed wire-cut electrical discharge machining (WEDM-MS) or electron beam welding (EBW). Thermal analyses of all absorbers have also been done to comply with the failure criteria of SSRF.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE07
About •	paper received ※ 08 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017
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WEPE09	Designing the Photon Beamline Frontends in the PETRAIII Extension Project	ion, vacuum, wiggler, damping	330
	H. Krüger, W.A. Caliebe, M. Degenhardt, M. Hesse, F. Marutzky, H.-B. Peters, R. Peters, M. Röhling, H. Schulte-Schrepping, B. Steffen DESY, Hamburg, Germany
	The new insertion device beamlines in the PETRAIII extension project are arranged in three new sector types. Following will present the designs of the photon beamlines frontends for these sectors. The designs are based on the original design concept developed for the photon beamline frontends at PETRAIII. The aim of this generic approach was to minimize the number of specialized components for all beamlines. The existing girder concept allows a fast and reliable installation phase. The newly designed frontends aimed at using the same proven components and minimizing of the number of girder variations. There will be 4 new sectors with two undulator IDs in each sector. The canting angle between the undulators has been increased from 5mrad to 20mrad in difference to the generic beamlines. Additionally, two of the straight sections are modified. One straight section will be transformed in a side station sector with a 1mrad canting angle. The other straight section with the 40m long damping wiggler will be used as a single beamline with a hard X-ray source. The modifications of the original frontend design, the components and the deviations between the sector types are being presented.
	Poster WEPE09 [4.799 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE09
About •	paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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WEPE14	Minimizing Grating Slope Errors in the IEX Monochromator at the Advanced Photon Source	ion, experiment, ISOL, optics	336
	M.V. Fisher, L. Assoufid, J.L. McChesney, J. Qian, R. Reininger, F.M. Rodolakis ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under contract number DE-AC02-06CH11357. The IEX beamline at the APS is currently in the commissioning phase. The energy resolution of the beamline was not meeting original specifications by several orders of magnitude. The monochromator, an in-focus VLS-PGM, is currently configured with a high and a medium-line-density grating. Experimental results indicated that both gratings were contributing to the poor energy resolution and this led to venting the monochromator to investigate. The initial suspicion was that a systematic error had occurred in the ruling process on the VLS gratings, but that proved to not be the case. Instead the problem was isolated to mechanical constraints used to mount the gratings into their respective side-cooled holders. Modifications were made to the holders to eliminate problematic constraints without compromising the rest of the design. Metrology performed on the gratings in the original and modified holders demonstrated a 20-fold improvement in the surface profile error which was consistent with finite element analysis performed in support of the modifications. Two gratings were successfully reinstalled and subsequent measurements with beam show a dramatic improvement in energy resolution.
	Poster WEPE14 [2.115 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE14
About •	paper received ※ 10 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017
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WEPE18	APS 2-ID Beamline, Upgrade to Canted Configuration	ion, radiation, synchrotron, undulator	342
	D. Capatina, M.A. Beno, M.V. Fisher, J.J. Knopp, B. Lai, E.R. Moog, C. Roehrig, S. Vogt ANL, Argonne, Illinois, USA
	Funding: Work at the Advanced Photon Source is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. To provide independent operation of the two 2-ID beamline experimental stations, a new canted beamline design is being developed. The constraint of keeping the existing front end limits the canting angle. The optimal canting angle was determined to be 400 urad and is achieved by using a permanent magnet. A coil is added to the canting magnet to provide a steering adjustment of maxi-mum 40 to 50 urad. In order to increase the beam separation as well as to provide power filtering and higher harmonics rejection for the downstream optics, a dual mirror system with focusing capability is used as the first optic at approximately 28 m from the center of the straight section. The inboard mirror (2.6 mrad) reflects the inboard beam outboard while the outboard mirror (4.1 mrad) reflects the outboard beam inboard. The beam presented to the dual mirror system is defined by two 1 mm x 1 mm apertures. The maximum power absorbed by each mirror is 200 W. Two vertically deflecting monochromators with minimum offset of 17 mm are located in the First Optical Enclosure on the outboard branch. The monochromator for the inboard branch is located in the corresponding experimental station.
	Poster WEPE18 [3.357 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE18
About •	paper received ※ 07 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017
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THAA03	Mechanical Design of New Dual Pinhole Mini-Beam Collimator With Motorized Pitch and Yaw Adjuster Provides Lower Background for X-Ray Crystallography at GMCA@APS	ion, background, scattering, software	387
	S. Xu, R. Fischetti, O. Makarov, S.A. Stepanov, N. Venugopalan ANL, Argonne, Illinois, USA
	Funding: GM/CA@APS has been funded in whole or in part with Federal funds from the National Cancer Institute (ACB-12002) and the National Institute of General Medical Sciences (AGM-12006). The GM/CA developed, quad-mini-beam collimator[,], advanced rastering and vector data-collection software tools[*], have enabled successful data collection on some of the most challenging problems in structural biology. There are two main sources of X-ray scattering (besides the sample) that reach the detector, contribute to back-ground and limit data resolution. These are scattering within the collimator that escapes the exit aperture and air-scattering of the direct beam before it terminates in the beamstop. Scattering from the collimator can be reduced by decreasing the exit aperture size. A quad mini-beam collimator was built consisting of 5/50, 10/70, 20/100 and 150/300 µm beam defining/exit aperture combination, respectively. Previous collimators were positioned in the X-ray beam by two motorized translational motions and two manual angular adjustments via a kinematic mount. Due to reduced tolerance in the new design, aligning each of the pin-hole combinations to high-precision required motorizing both translational and angular motions. Design and con-struction of the improved mini-beam collimator and the extent of background reduction will be discussed. Fischetti, et al.,JSR 16, 217-225 PMCID 2725011 S. Xu, et al, AIP 1234, 897 - 900 (2010) * Hilgart, et al, J Synchr. Radiat. 2011:717-22. doi: 10.1107/S0909049511029918. Epub 2011 Jul 29
	Slides THAA03 [6.682 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-THAA03
About •	paper received ※ 10 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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Paper

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MOPE05

Mechanical Design of Secondary Source Slits for Hard X-ray Beamlines at Taiwan Photon Source

ion, controls, scattering, site

12

H.Y. Yan, C.H. Chang, S.H. Chang, C.Y. Chen, C.Y. Huang, J.M. Lin, D.G. Liu, D.-J. Wang
NSRRC, Hsinchu, Taiwan

The secondary source slits have been developed for specific hard X-ray beam-lines at Taiwan Photon Source. Especially for Coherent X-ray Scattering and X-ray Nanoprobe beam-lines, severe specifications of the slits are more necessary to define proper beam sizes in horizontal and vertical directions at sample. The opening size of each pair of slits assembled orthogonally is usually needed to range within several microns, so the UHV-compatible piezo-driven stages with closed-loop system were adopted for the purposes of fine adjustment, precise positional accuracy and repeatability. To reduce X-ray scattering effect, the rectangular single-crystal film was bonded on the edge of the slit blade. The machined rotary weak-link structure and piezo-driven actuators were used to slightly adjust parallelism of each pair of the blades with the method of single-slit diffraction. To enhance structural and thermal stability, the granite plinths with specified shape were designed and the precise temperature controlling system will be set up recently. The overall design, mechanical specifications and procedure of testing for secondary source slits will be introduced in this paper.

Poster MOPE05 [0.795 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE05

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paper received ※ 09 September 2016 paper accepted ※ 14 September 2016 issue date ※ 22 June 2017

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MOPE23

An Assembling Calibration Method of XBPM Diamond Blades in TPS

ion, survey, alignment, network

54

H.C. Ho, M.L. Chen, K.H. Hsu, D.-G. Huang, C.K. Kuan, W.Y. Lai, C.J. Lin, S.Y. Perng, T.C. Tseng, H.S. Wang
NSRRC, Hsinchu, Taiwan

Diamond blade type X-ray Beam Position Monitors (XBPM) were adopted to monitor photon position at the beamline front-end in Taiwan Photon Source (TPS). Due to the thin thickness (125um) and fragile characteristic, the assembling precision of the diamond blades are hard to measure and influence the accuracy of monitor. A non-contact method was thus developed by using a led laser with telecentric objective lens and a CCD-array to calibrate the diamond blades assembling configuration within micrometer accuracy. According to the measurement results, XBPM can be correlated to four fiducial points for survey network. This paper describes this method and calibrating results in detail.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE23

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paper received ※ 10 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017

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MOPE24

The Precision Adjustment Holder for Montel Mirrors

ion, focusing, optics, alignment

57

B.Y. Chen, S.H. Chang, H.Y. Chen, C.Y. Lee, B.H. Lin, M.T. Tang, S.C. Tseng, J.X. Wu, G.C. Yin
NSRRC, Hsinchu, Taiwan
M. Hong
National Taiwan University, Taipei, Taiwan
J.R. Kwo
NTHU, Hsinchu, Taiwan

The focusing of X-ray nanoprobe at TPS relay upon the special designed Montel mirrors and its adjustment holder. The holder includes two major parts: (1) fundamental-position alignment part and (2) relative-position adjustment part. The fundamental-position alignment part has the ability to adjust the two mirrors together in 6 DOF., such as X, Y, Z, pitch, roll, and yaw. These translation stages have several-tens mm travel range and nm resolution, while the rotational stages have 40 mrad azimuthal angular range and 0.1~0.01 µrad resolution. The relative-position adjustment part can further adjust the two mirrors to minimize the focal spot. During the pre-alignment process, one of the mirrors can be manual adjusted by micrometer heads in three translation directions with several mm travel range and micro-meters resolution. These micrometer heads also provide this mirror three rotational degree of freedoms with sub-mrad resolution. For the further alignment in vacuum, the additional four piezo-motor actuators can precisely adjust the other Montel mirror in the Y and Z direction with several nm resolution, and its pitch and roll with 1 urad and 0.05 urad resolution, respectively.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE24

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paper received ※ 14 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017

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MOPE26

Front End Photon Shutter Water Leak to Vacuum at the Canadian Light Source

ion, operation, vacuum, cavity

60

G.R. Henneberg, M.J.P. Adam, G.R. Barkway
CLS, Saskatoon, Saskatchewan, Canada

In early July 2016 CLS experienced a water to vacuum leak in the storage ring. The source of the leak was a pin hole in the absorbing surface of Photon Shutter 1 in the front end of the HXMA Beamline. The leak was caused by high velocity cooling water erosion of the internal cooling water path of the copper photon shutter block. The poster will present the root cause analysis of the leak, implications for other identical photon shutters and currently in service and the current remedial action plan.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE26

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paper received ※ 11 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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MOPE40

Designing the Flash II Photon Diagnostic Beamline and Components

ion, diagnostics, vacuum, experiment

96

D. Meissner, M. Brachmanski, M. Hesse, U. Jastrow, M. Kuhlmann, H. Mahn, F. Marutzky, E. Plönjes-Palm, M. Röhling, H. Schulte-Schrepping, K.I. Tiedtke, R. Treusch
DESY, Hamburg, Germany

From 2013 to 2016 the free electron laser FLASH at DESY in Hamburg, Germany was upgraded with a second undulator line, photon diagnostic line, beam distribution and experimental hall connected to the same linear accelerator. This paper shows the layout of the photon diagnostic section and an overview of the civil engineering challenges. The mechanical design of selected components, e.g. vacuum components, diagnostic equipment and safety related components is presented.

Poster MOPE40 [1.081 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE40

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paper received ※ 08 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

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TUBA04

Mechanical Design and Development of Compact Linear Nanopositioning Flexure Stages with Centimeter-Level Travel Range and Nanometer-Level Resolution

ion, GUI, controls, laser

124

D. Shu, J.W.J. Anton, S.P. Kearney, B. Lai, W. Liu, J. Maser, C. Roehrig, J.Z. Tischler
ANL, Argonne, Illinois, USA
J.W.J. Anton
University of Illinois at Chicago, Chicago, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
Nanopositioning techniques present an important capability to support the state-of-the-art synchrotron radiation instrumentation research for the APS operations and upgrade project. To overcome the performance limitations of precision ball-bearing-based or roller-bearing-based linear stage systems, two compact linear nanopositiioning flexure stages have been designed and developed at the APS with centimeter-level travel range and nanometer-level resolution for x-ray experimental applications. The APS T8-54 linear flexure stage is designed to perform a precision wire scan as a differential aperture for the 3-D diffraction microscope at the APS sector 34, and the APS T8-56 linear flexure stage is designed for a horizontal sample scanning stage for a hard x-ray microscope at the APS sector 2. Both linear flexure stages are using a similar improved deformation compensated linear guiding mechanism which was developed initially at the APS for the T8-52 flexural linear stage *. The mechanical design and finite element analyses of the APS T8-54 and T8-56 flexural stages, as well as its initial mechanical test results with laser interferometer are described in this paper.
* U.S. Patent granted No. 8,957, 567, D. Shu, S. Kearney, and C. Preissner, 2015.

Slides TUBA04 [7.057 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA04

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paper received ※ 10 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017

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TUPE08

Finite Element Analysis of a Photon Absorber Based on Volumetric Absorption of the Photon Beam

ion, radiation, simulation, synchrotron-radiation

169

K.J. Suthar, P.K. Den Hartog
ANL, Argonne, Illinois, USA

Funding: This research used resources of the APS, a U.S. Department of Energy (DOE) Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Designing photon absorbers for next generation multibend achromat storage rings can be challenging considering the high power densities and limited space that will typically be present. The potential for problematically high material temperatures and thermal gradients can be expected to be greater than that for previous generation machines on account of the shorter source-to-receiving surface distances. Conventionally, photon absorbers are made from copper which is highly opaque to x-rays. A consequence of this is that the majority of the heat is absorbed within a very short distance of the surface. Utilizing materials that allow a more volumetric absorption of the radiation can improve the efficiency of heat removal as it can keep surface temperatures and thermal gradients lower than would otherwise be possible. This paper discusses multiphysics analysis of a crotch absorber for the APS Upgrade project (APS-U) via full-coupling of heat-transfer and structural mechanics. The simulation results are discussed in detail.

Poster TUPE08 [1.943 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE08

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paper received ※ 10 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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TUPE23

Glidcop Brazing in Sirius’ High Heat Load Front-End Components

ion, vacuum, synchrotron, operation

216

G.V. Claudiano, O.R. Bagnato, P.T. Fonseca, F.R. Francisco, R.L. Parise, L.M. Volpe
LNLS, Campinas, Brazil

Sirius is a 4th generation synchrotron light source in project. Some of Sirius’ beamlines will have a very high power density, more than 50 kW/mrad², to be dissipated in components that have a limited space condition. Thus, the refrigeration of these components is complex when one has in mind that the coolant flow cannot be too turbulent in order to not induce much vibration in the components. Oxygen Free Electrolytic Cu (OFEC) has been replaced by the Glidcop, on 4th generation synchrotron applications, due to its good thermal conductivity and preservation of mechanical properties after heating cycles. However, as this material is not very workable in terms of union with other materials, which led to the development of a brazing process for Glidcop and stainless steel union. Glidcop samples were submitted to a Cu-electroplating process and a silver base alloy (BVAg-8) was used to join the parts in a high vacuum furnace. Electroplating was used to improve the filler metal wettability. The results were very satisfactory, ensuring water and vacuum tightness. A desirable characteristic not yet proved is the virtual leak property. This paper will discourse about this brazing method.

Poster TUPE23 [1.553 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE23

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paper received ※ 09 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017

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TUPE28

Characterization of the Acoustic Field Generated by the Single-Axis Acoustic Levitator

ion, experiment, simulation, LabView

226

A. Chavan
GIT/ECE, Atlanta, Georgia, USA
A. DiChiara, P.D. Hartog, B. Hu, K.J. Suthar
ANL, Argonne, Illinois, USA

The acoustic levitator utilizes two transducers that emit acoustic waves. A standing wave is generated between the two transducers that allows for the levitation of particles at the nodes of the standing wave. These levitated particles experience an instability. In order to aid in the process of solving this instability, the acoustic field created by one of the transducers was characterized in this experiment. This characterization helps to understand the intensity of the acoustic field at different points throughout the region and how the acoustic wave diverges as it travels away from the transducer.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE28

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paper received ※ 10 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

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TUPE31

Manufacturing of Photon Beam-Intercepting Components from CuCrZr

ion, vacuum, operation, synchrotron

233

F.A. DePaola, C. Amundsen, S.K. Sharma
BNL, Upton, Long Island, New York, USA

Photon beam-intercepting components in synchrotron light sources have usually been made as water-cooled Glidcop bodies brazed to stainless steel conflate flanges. This fabrication method involves many manufacturing steps which result in increased cost, long procurement time and lower manufacturing reliability. A new design approach was recently proposed which simplifies fabrication by eliminating brazing and utilizes a readily available copper alloy, CuCrZr. This paper describes the manufacturing experience gained at NSLS-II from fabricating many components of this new design. Results of an investigation of various techniques for joining CuCrZr to itself and to SS304 and AL-6061 are also presented.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE31

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paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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TUPE44

Optimization for the APS-U Magnet Support Structure

ion, alignment, ECR, software

254

Z. Liu, H. Cease, J.T. Collins, J. Nudell, C.A. Preissner
ANL, Argonne, Illinois, USA

Funding: Work supported by: Argonne is managed by UChicago Argonne, LLC, for the U.S. Department of Energy under contract DE-AC02-06CH11357.
The Advanced Photon Source Upgrade (APSU) is to replace the existing storage ring with a multi-bend achromats (MBA) accelerator lattice *. For the APS-U removal and installation, current planning calls for a 12-month shutdown and testing period, prior to resumption of operations. It calls for quick installation of the magnet support system with assembly and installation alignment tolerance. A three-point, semi-kinematic vertical mount for the magnet modules is the approach to reduce time for alignment. The longest section is the curved FODO section (four quads with three Q-bends interleaved, and a three-pole wiggler). All magnets of the FODO section sit on a single piece of support structure in order to have a good control over the magnet-to-magnet alignment tolerance. It brings challenge to minimize the top surface deflection and maximize the first mode frequency of the magnet support structure that is supported at three points. These constraints call for the need of optimizing the magnet support structures. Details of the optimization, including three-point positioning, material selection, and topology optimization, are reported in this study.
* Glenn Decker (2014) Design Study of an MBA Lattice for the Advanced Photon Source, Synchrotron Radiation News, 27:6, 13-17, DOI: 10.1080/08940886.2014.970932

Poster TUPE44 [1.889 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE44

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paper received ※ 07 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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WEBA03

Recent Progress on the Design of High-Heat-Load Components

ion, SRF, dipole, vacuum

277

S.K. Sharma, C. Amundsen, F.A. DePaola, F.C. Lincoln, J.L. Tuozzolo
BNL, Upton, Long Island, New York, USA

A new design was recently proposed for the high power masks and slits of the front-ends at the 2014 MEDSI Conference. The main features of the new design are integrated knife edges in high conductivity copper alloys, interception of the photon beam only on horizontal surfaces, replacing Glidcop® with readily available CuCrZr, and thermal optimization with internal fins. Numerous components based on this design have been built for NSLS-II front-ends and some of the design features have been incorporated into other high-heat-load components such as beamline masks and crotch absorbers. In this paper we describe recent progress at NSLS-II in further advancing this design approach by FE analysis, fabrication and testing.

Slides WEBA03 [4.523 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA03

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paper received ※ 09 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017

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WEBA04

A Discussion on Utilization of Heat Pipes and Vapour Chamber Technology as a Primary Device for Heat Extraction from Photon Absorber Surfaces

ion, radiation, simulation, factory

280

K.J. Suthar, P.K. Den Hartog, A.M. Lurie
ANL, Argonne, Illinois, USA

Funding: This research used resources of the APS, a U.S. Department of Energy Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
The basic problem for photon absorbers in a particle accelerator is to remove a large quantity of heat from a small space. Heat pipes and vapor chambers excel at precisely this so it is natural to consider them for the application. However, even though this technology has been proven to be an excellent thermal management solution for cooling everything from laptops to satellite shields in space, they have yet to be adopted for use in particle accelerators. The use of heat pipes and vapor chambers are thermal transport devices which work on the principle of capillary-force-driven two-phase flow. These devices are highly customizable and offer very high effective thermal conductivities (5,000-200, 000 W/m/K) depending on many factors including size, shape, and orientation. This paper discusses feasibility of the use of heat pipes and vapor chambers as the primary heat transport devices in particle accelerator photon absorbers. We discuss their limitations and advantages via careful consideration of analysis and simulation results assuming properties described in the literature and manufacturer specifications.

Slides WEBA04 [3.263 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA04

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paper received ※ 10 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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WEPE01

Combined Fixed Mask, Photon Shutter, Safety Shutter, and Collimator Design for BXDS IVU at the CLS

ion, radiation, operation, vacuum

309

M.J.P. Adam, C. Bodnarchuk
CLS, Saskatoon, Saskatchewan, Canada

Funding: Canadian Foundation for Innovation
The first shutter assembly outside of the Front End (FE) for Brockhouse X-Ray Diffraction and Scattering Sector (BXDS) beamline required a unique design solution to accommodate all components into required safety shutter position. Located between the IVW high energy wiggler monochromator and POE1 wall, the total envelope size approximated 1m x 0.660m (LxW). Accommodating a smaller space required an alternative shutter design than traditionally used implemented at the CLS. The alternative proposed design combined the collimator (CLM), safety shutter (SSH), photon shutter (PSH) and Fixed Mask (FM) into one chamber. Finite Element Analysis (FEA) was conducted on the FM and PSH assembly to verify that geometric designs were adequate for reasonable operation in the beamline. FEA was used to determine the steady-state thermal and static-structural response in both operating positions. Missteer was analyzed for both operating positions to a maximum of 2.5mm (commonly accepted missteer used at the CLS) from center. Finally, two extreme position (5mm) analyses were completed for determination of potential, but unlikely operating conditions.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE01

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paper received ※ 11 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

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WEPE03

Beamline Front Ends at the 2.5-GeV Photon Factory Storage Ring

ion, wiggler, storage-ring, undulator

315

H. Miyauchi, S. Asaoka, T. Tahara
KEK, Ibaraki, Japan

Since the first commissioning in 1982, the 2.5-GeV Photon Factory storage ring has been upgraded three times in 1986, 1997 and 2005, in order to reduce the beam emittance and to create new four short straight sections for in-vacuum short period undulators. To satisfy the new boundary conditions of the upgrades, the beamline front ends were re-designed. We look back on the history of the beamline front-end components at the Photon Factory.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE03

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paper received ※ 15 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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WEPE06

High Heat Load Front Ends for Sirius

ion, vacuum, storage-ring, radiation

324

L.M. Volpe, H.F. Canova, P.T. Fonseca, P.P.S. Freitas, A. Gilmour, A.S. Rocha, G.L.M.P. Rodrigues, L. Sanfelici, M. Saveri Silva, H. Westfahl Jr., H.G.P. de Oliveira
LNLS, Campinas, Brazil

Funding: Brazilian Ministry of Science, Technology, Innovation and Communication (MCTIC)
Currently under construction on Brazilian Synchrotron Light Laboratory Campus, Campinas/SP, Sirius is a 3GeV, 4th Generation Synchrotron Light Source. In this paper we describe the Front End that has been designed to transmit the intense synchrotron radiation generated by the insertion devices that will generate the most critical thermal stress, with a peak power density of 55.7 kW/mrad² and a total power of 9.3kW at 500mA in the storage ring. The functions of the main components and their location in the layout are described. Computational fluid dynamics (CFD) and structural simulations, that have been carried out to verify the performance under the high heat loads generated by Sirius, are also detailed along with the limits of temperature and stress that have been employed in the design.

Poster WEPE06 [1.415 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE06

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paper received ※ 11 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017

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WEPE07

A High Heat Load Front-End for the Superconducting Wiggler Beamline at SSRF

ion, SRF, vacuum, radiation

327

Y. Li, D. Jia, S. Xue, M. Zhang, W. Zhu
SINAP, Shanghai, People’s Republic of China

A superconducting wiggler (SCW) will be first employed to generate high energy X-rays for ultra-hard X-ray applications beamline at Shanghai synchrotron radiation facility (SSRF). The front-end will handle a heat load of 44.7 kW with a peak power density of 45 kW/mrad², which is much higher than the commissioned ones at SSRF. Overall design of the high heat load front-end has been completed, including one short absorber with a length of 300 mm and three long absorbers longer than 500 mm. Long absorbers have been designed to be made by medium speed wire-cut electrical discharge machining (WEDM-MS) or electron beam welding (EBW). Thermal analyses of all absorbers have also been done to comply with the failure criteria of SSRF.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE07

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paper received ※ 08 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017

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WEPE09

Designing the Photon Beamline Frontends in the PETRAIII Extension Project

ion, vacuum, wiggler, damping

330

H. Krüger, W.A. Caliebe, M. Degenhardt, M. Hesse, F. Marutzky, H.-B. Peters, R. Peters, M. Röhling, H. Schulte-Schrepping, B. Steffen
DESY, Hamburg, Germany

The new insertion device beamlines in the PETRAIII extension project are arranged in three new sector types. Following will present the designs of the photon beamlines frontends for these sectors. The designs are based on the original design concept developed for the photon beamline frontends at PETRAIII. The aim of this generic approach was to minimize the number of specialized components for all beamlines. The existing girder concept allows a fast and reliable installation phase. The newly designed frontends aimed at using the same proven components and minimizing of the number of girder variations. There will be 4 new sectors with two undulator IDs in each sector. The canting angle between the undulators has been increased from 5mrad to 20mrad in difference to the generic beamlines. Additionally, two of the straight sections are modified. One straight section will be transformed in a side station sector with a 1mrad canting angle. The other straight section with the 40m long damping wiggler will be used as a single beamline with a hard X-ray source. The modifications of the original frontend design, the components and the deviations between the sector types are being presented.

Poster WEPE09 [4.799 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE09

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paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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WEPE14

Minimizing Grating Slope Errors in the IEX Monochromator at the Advanced Photon Source

ion, experiment, ISOL, optics

336

M.V. Fisher, L. Assoufid, J.L. McChesney, J. Qian, R. Reininger, F.M. Rodolakis
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under contract number DE-AC02-06CH11357.
The IEX beamline at the APS is currently in the commissioning phase. The energy resolution of the beamline was not meeting original specifications by several orders of magnitude. The monochromator, an in-focus VLS-PGM, is currently configured with a high and a medium-line-density grating. Experimental results indicated that both gratings were contributing to the poor energy resolution and this led to venting the monochromator to investigate. The initial suspicion was that a systematic error had occurred in the ruling process on the VLS gratings, but that proved to not be the case. Instead the problem was isolated to mechanical constraints used to mount the gratings into their respective side-cooled holders. Modifications were made to the holders to eliminate problematic constraints without compromising the rest of the design. Metrology performed on the gratings in the original and modified holders demonstrated a 20-fold improvement in the surface profile error which was consistent with finite element analysis performed in support of the modifications. Two gratings were successfully reinstalled and subsequent measurements with beam show a dramatic improvement in energy resolution.

Poster WEPE14 [2.115 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE14

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paper received ※ 10 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017

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WEPE18

APS 2-ID Beamline, Upgrade to Canted Configuration

ion, radiation, synchrotron, undulator

342

D. Capatina, M.A. Beno, M.V. Fisher, J.J. Knopp, B. Lai, E.R. Moog, C. Roehrig, S. Vogt
ANL, Argonne, Illinois, USA

Funding: Work at the Advanced Photon Source is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
To provide independent operation of the two 2-ID beamline experimental stations, a new canted beamline design is being developed. The constraint of keeping the existing front end limits the canting angle. The optimal canting angle was determined to be 400 urad and is achieved by using a permanent magnet. A coil is added to the canting magnet to provide a steering adjustment of maxi-mum 40 to 50 urad. In order to increase the beam separation as well as to provide power filtering and higher harmonics rejection for the downstream optics, a dual mirror system with focusing capability is used as the first optic at approximately 28 m from the center of the straight section. The inboard mirror (2.6 mrad) reflects the inboard beam outboard while the outboard mirror (4.1 mrad) reflects the outboard beam inboard. The beam presented to the dual mirror system is defined by two 1 mm x 1 mm apertures. The maximum power absorbed by each mirror is 200 W. Two vertically deflecting monochromators with minimum offset of 17 mm are located in the First Optical Enclosure on the outboard branch. The monochromator for the inboard branch is located in the corresponding experimental station.

Poster WEPE18 [3.357 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE18

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paper received ※ 07 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017

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THAA03

Mechanical Design of New Dual Pinhole Mini-Beam Collimator With Motorized Pitch and Yaw Adjuster Provides Lower Background for X-Ray Crystallography at GMCA@APS

ion, background, scattering, software

387

S. Xu, R. Fischetti, O. Makarov, S.A. Stepanov, N. Venugopalan
ANL, Argonne, Illinois, USA

Funding: GM/CA@APS has been funded in whole or in part with Federal funds from the National Cancer Institute (ACB-12002) and the National Institute of General Medical Sciences (AGM-12006).
The GM/CA developed, quad-mini-beam collimator[*,**], advanced rastering and vector data-collection software tools[***], have enabled successful data collection on some of the most challenging problems in structural biology. There are two main sources of X-ray scattering (besides the sample) that reach the detector, contribute to back-ground and limit data resolution. These are scattering within the collimator that escapes the exit aperture and air-scattering of the direct beam before it terminates in the beamstop. Scattering from the collimator can be reduced by decreasing the exit aperture size. A quad mini-beam collimator was built consisting of 5/50, 10/70, 20/100 and 150/300 µm beam defining/exit aperture combination, respectively. Previous collimators were positioned in the X-ray beam by two motorized translational motions and two manual angular adjustments via a kinematic mount. Due to reduced tolerance in the new design, aligning each of the pin-hole combinations to high-precision required motorizing both translational and angular motions. Design and con-struction of the improved mini-beam collimator and the extent of background reduction will be discussed.
* Fischetti, et al.,JSR 16, 217-225 PMCID 2725011
** S. Xu, et al, AIP 1234, 897 - 900 (2010)
*** Hilgart, et al, J Synchr. Radiat. 2011:717-22. doi: 10.1107/S0909049511029918. Epub 2011 Jul 29

Slides THAA03 [6.682 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-THAA03

About •

paper received ※ 10 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)